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USHIO USH-3502MA — mercury short-arc lamp, 3.5 kW

Lithography: semiconductor, LCD and PCB pattern exposure

Rated power3500 W

Lamp voltage62 V

Lamp current56 A

Arc gap (cold)6.6 mm

Overall length324 (with nuts) / 290 mm

Light centre length145 mm

Bulb diameter70 mm

Base / connectionM8×1.25 thread; cathode hex cap 27 A/F, anode Ø27

Burn positionvertical ±15°

Rated life700 h

ApplicationLithography: semiconductor, LCD and PCB pattern exposure

USHIO USH-3502MA — Schematic, not to scale. Dimensions shown are the published values for this part number. The light-centre reference end differs between lamp types; confirm against the original drawing.

Need a USH-3502MA replacement?

Send the part number and your exposure tool model. We check power, base, dimensions and burn position against the original and quote within 24 hours.

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Lamps with closely matching published data

Same power class and voltage/current within a few percent. This is not a statement of interchangeability — base, cable, length and light-centre length must also match your lamphouse. Send us both part numbers and we will check.

Part number	Power	Voltage	Current	Ø mm	Length mm
OSRAM HBO 3500 W/MR	3500 W	62 V	56 A	70	290

Other mercury lamps of similar power

OSRAM HBO 3500 W/PIL OSRAM HBO 3500 W/PI OSRAM HBO 3501 W/PI OSRAM HBO 4000 W/PL OSRAM HBO 3500 W/MR OSRAM HBO 3500 W/HK Advanced Radiation HSA-3500 TAM

Frequently asked

What is the USHIO USH-3502MA used for?

It is a 3500 W super-high-pressure mercury short-arc lamp used for lithography: semiconductor, lcd and pcb pattern exposure.

Can you supply a replacement for the USHIO USH-3502MA?

Send us the part number, a photo of the lamp label and your exposure tool model. We match power, voltage, current, base, cable, overall length and light-centre length against the original before we quote, and state warranty hours on the quote.

How often should an exposure mercury lamp be replaced?

Typical rated life for high-power lithography and exposure lamps is 500 to 2,250 hours depending on type. UV output falls and arc stability degrades with age, which shows up as longer exposure times and non-uniformity, so plan replacement at rated life.

Safety: mercury short-arc lamps are under high pressure and contain mercury. Handle with face shield and gloves, keep the protective cover on until installed, and return used lamps for mercury recycling.

Specifications as published in: USHIO Inc. super-high-pressure mercury lamp specifications (source). Older types may be discontinued by the manufacturer; data is given for identification only. Lamps supplied by Kilowatt Lamps are compatible replacements and are not made by or affiliated with USHIO.